If the power factor of the LEDs is unknown, use 0.7 as the value for this calculation. Once you have
determined the total wattage or total VA value of the run, make sure that the transformer that you have
selected has excess capacity in the event that new fixtures are connected to the system at a later date.
Example: 15 fixtures are each operating a 3W LED lamp with an unknown PF value.
A transformer with a maximum wattage rating of 150W can be utilized.
MOUNT THE TRANSFORMER UNIT
1) Remove transformer door for easy access.
2) Find a solid, flat surface to mount the transformer in a location:
a) That is at least 12 inches between the terminals and ground level with wire terminals
facing down and
b) Six feet or fewer from a 120V supply circuit that is protected by a Class A type ground
fault circuit interrupter
3) Insert load bearing screws or wall anchors into pre-drilled holes that align with the
corresponding keyhole slots on the transformer’s mounting brackets.
4) Secure the transformer’s keyhole slots on the mounting brackets to the load bearing screws
or wall anchors
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